I am using the Kimbrough large. You have to drill to two extra holes a little lower in it though.

I have been using the tungsten diff balls, and I polish the diff rings before assembly.

I have been using 30wt oil all around (two hole), HPI radials front, and HPI x-patterns in the rear. Both have HPI green inserts trimmed to fit the smaller diameter.

Ride height at SoCal is 5 front, and 6mm rear. I also set the tweak on the car, even though I get harassed for it.... have all the electronics stufts inside the rear part of the chassis too.

Hope this helps.